[3.13] gh-121735: Fix module-adjacent references in zip files (GH-123037) by miss-islington · Pull Request #123986 · python/cpython

…H-123037)

* pythongh-116608: Apply style and compatibility changes from importlib_metadata.

* pythongh-121735: Ensure module-adjacent resources are loadable from a zipfile.

* pythongh-121735: Allow all modules to be processed by the ZipReader.

* Add blurb

* Remove update-zips script, unneeded.

* Remove unnecessary references to removed static fixtures.

* Remove zipdata fixtures, unused.
(cherry picked from commit ba687d9)

Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>